CN117438684A - Module expansion risk detection method and detection device - Google Patents
Module expansion risk detection method and detection device Download PDFInfo
- Publication number
- CN117438684A CN117438684A CN202311389619.1A CN202311389619A CN117438684A CN 117438684 A CN117438684 A CN 117438684A CN 202311389619 A CN202311389619 A CN 202311389619A CN 117438684 A CN117438684 A CN 117438684A
- Authority
- CN
- China
- Prior art keywords
- battery cell
- battery
- pressure sensor
- detection
- risk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 112
- 238000000034 method Methods 0.000 claims description 10
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 7
- 238000000429 assembly Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 4
- 206010042674 Swelling Diseases 0.000 claims 1
- 230000008961 swelling Effects 0.000 claims 1
- 238000001125 extrusion Methods 0.000 abstract description 10
- 238000009434 installation Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 description 5
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a module expansion risk detection method and device. According to the module expansion risk detection method, the extrusion force between the inner walls of the shell structures is directly detected through the pressure sensor, the existing battery module structure and the shell structures of the battery cells are maintained, the stress of bare battery cells in other battery cells can be accurately and indirectly measured, the interference of the shell structures of the battery cells on the expansion force is eliminated, and therefore the expansion risk of electric abuse and thermal abuse is accurately reflected, the required detection structure is simple and easy to obtain, and the detection with higher accuracy can be carried out in a specific use scene. Meanwhile, the pressure sensor is arranged in the shell structure, so that the pressure sensor has enough installation space, and a non-film type pressure sensor can be selected, so that the problems of large error, short service life, data drift and the like of the film pressure sensor can be avoided, and the accuracy of a detection result is improved.
Description
Technical Field
The invention relates to the technical field of safety detection of battery modules, in particular to a module expansion risk detection method and device.
Background
The expansion deformation of the battery cell may cause short circuit in the battery module, namely electric abuse is caused, and the electric abuse is often accompanied by a large amount of heat release, the accumulation of heat causes thermal abuse, and finally the thermal abuse causes the temperature of the battery cell to rise, so that thermal runaway chain reaction is caused, and the risk of fire and explosion occurs.
Through the detection to the inside pressure of battery module, can reflect the electric core expansion degree in the battery module to abuse to electricity, heat abuse carries out the early warning. The existing detection method mainly comprises the step of attaching a film pressure sensor to the surface of a battery cell inside the battery module, so that the expansion risk of the battery module is qualitatively reflected by detecting the extrusion force between the battery cells. However, this detection method has at least the following problems:
1. the detection method has the advantages that the degree of reflection of the expansion risk of the battery module is not accurate enough;
2. the film pressure sensor has larger detection error, can be used only in a short time after calibration, can generate serious data drift after long-time use, and is difficult to give accurate pressure values.
Based on the foregoing, there is a need for a module expansion risk detection method and a detection device to solve at least one of the above-mentioned problems.
Disclosure of Invention
An object of the present invention is to provide a die set expansion risk detection method capable of accurately detecting a die set expansion risk and maintaining the accuracy of a detection result for a long period of time.
To achieve the purpose, the invention adopts the following technical scheme:
the module expansion risk detection method comprises the following steps:
replacing at least one battery cell in a battery module with an imitation battery cell detection assembly, wherein a pressure sensor is arranged in the imitation battery cell detection assembly and is used for indirectly detecting the stress of a bare battery cell in the battery cell;
and charging and/or discharging the battery module, and evaluating the expansion risk of the battery module according to the detection value of the pressure sensor.
Optionally, the battery cell simulating detection assemblies have the same shell structure as the battery cells, and each battery cell simulating detection assembly is used for replacing one battery cell.
Optionally, replacing one of the above-mentioned battery cells with the above-mentioned battery cell simulating detection assembly; or,
and replacing at least two of the battery cells with the battery cell simulating detection assembly.
Optionally, the battery cells are sandwiched between two adjacent battery cell simulating detection assemblies.
Alternatively, the battery module is mounted to a vehicle, and the detection value is obtained.
Alternatively, the detection value is obtained when the vehicle is in a running state.
The module expansion risk detection method provided by the invention has the beneficial effects that: the extrusion force between the inner walls of the shell structure is directly detected through the pressure sensor, the existing battery module structure and the shell structure of the battery core are maintained, the stress of bare battery cores in other battery cores can be accurately and indirectly measured, the interference of the shell structure of the battery core to the expansion force is eliminated, the expansion risk of electric abuse and thermal abuse is accurately reflected, the required detection structure is simple and easy to obtain, and the detection with higher accuracy can be carried out in a specific use scene. Meanwhile, the pressure sensor is arranged in the shell structure, so that the pressure sensor has enough installation space, and a non-film type pressure sensor can be selected, so that the problems of large error, short service life, data drift and the like of the film pressure sensor can be avoided, and the accuracy of a detection result is improved.
Another object of the present invention is to provide a detection device capable of accurately detecting a risk of die set expansion and maintaining the accuracy of the detection result for a long period of time.
To achieve the purpose, the invention adopts the following technical scheme:
the detection device is used for implementing the module expansion risk detection method and comprises at least one imitated battery cell detection assembly, and each imitated battery cell detection assembly can be installed on the battery module instead of one battery cell; the battery cell simulating detection assembly has the same shell structure as the battery cell, a pressure sensor is arranged in the shell structure, and the pressure sensor can indirectly detect the stress of the bare battery cell in the battery cell.
Optionally, the battery cell simulating detection assembly is provided with a simulated positive electrode lug and a simulated negative electrode lug which are electrically connected, and the simulated positive electrode lug and the simulated negative electrode lug are used for being electrically connected with the battery cell.
Optionally, a pole piece is disposed in the housing structure, where the pole piece includes a positive pole piece or a negative pole piece, and the pole piece is abutted between the pressure sensor and an inner wall of the housing structure.
Optionally, a metal strip is disposed in the housing structure, and two ends of the metal strip penetrate out of the housing structure to form the simulated positive electrode tab and the simulated negative electrode tab.
The detection device provided by the invention has the beneficial effects that: the extrusion force between the inner walls of the shell structure is directly detected through the pressure sensor, the existing battery module structure and the shell structure of the battery core are maintained, the stress of bare battery cores in other battery cores can be more accurately and indirectly measured, the interference of the shell structure of the battery core on the expansion force is eliminated, and accordingly the expansion risk of electric abuse and thermal abuse is more accurately reflected. Meanwhile, the pressure sensor is arranged in the shell structure, so that the pressure sensor has enough installation space, and a non-film type pressure sensor can be selected, so that the problems of large error, short service life, data drift and the like of the film pressure sensor can be avoided, and the accuracy of a detection result is improved.
Drawings
FIG. 1 is a schematic diagram showing connection between an imitated battery cell detection assembly and a battery cell in a battery module;
FIG. 2 is a schematic diagram of the structure of the cell-like detection assembly of the present invention;
fig. 3 is a schematic diagram of the internal structure of the battery cell simulating detection assembly according to the present invention.
In the figure:
1. an imitation cell detection assembly; 10. a housing structure; 11. a pressure sensor; 12. a metal belt; 13. a pole piece;
2. and a battery cell.
Detailed Description
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixed or removable, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The method and apparatus for detecting risk of module expansion according to the present invention will be described with reference to fig. 1 to 3.
Specifically, as shown in fig. 1 and 2, in the present embodiment, the detection device mainly includes an imitated battery cell detection assembly 1, where the imitated battery cell detection assembly 1 has a housing structure 10 identical to a real battery cell 2, can replace the battery cell 2 in the battery module, and is installed in the battery module together with other battery cells 2. And, be provided with pressure sensor 11 in the shell structure 10, pressure sensor 11 can detect imitative electric core detection component 1's shell structure 10 internal wall between the pressure (by the detected value embodiment) to the inflation risk of accurate reaction battery module.
In the present invention, the battery cell 2 may be a soft battery cell 2 or a hard battery cell 2. The soft battery cell 2 uses a soft material such as an aluminum plastic film as the case structure 10, and the hard battery cell 2 uses a hard material such as an aluminum case as the case structure 10. Whether the soft battery core 2 or the hard battery core 2 is the soft battery core 2 or the hard battery core 2, the reasons for the expansion risk of electric abuse or even thermal abuse are generally that the bare battery core (i.e. the sum of the positive plate, the diaphragm and the negative plate) in the soft battery core 2 or the hard battery core 2 is directly extruded by the shell structure 10 under the action of the internal pressure of the module, so that the phenomena of diaphragm rupture and the like occur.
Therefore, in the invention, the extrusion force between the inner walls of the shell structure 10 is directly detected by the pressure sensor 11, and the existing battery module structure and the shell structure 10 of the battery core 2 are maintained, so that the stress of bare cells in other battery cores 2 can be more accurately and indirectly measured, the interference of the shell structure 10 of the battery core 2 on the expansion force is eliminated, and the expansion risk of electric abuse and thermal abuse is more accurately reflected. Meanwhile, the pressure sensor 11 is arranged in the shell structure 10, so that the shell structure has enough installation space, and the pressure sensor 11 of a non-film type can be selected, so that the problems of large error, short service life, data drift and the like of the film pressure sensor 11 can be avoided, and the accuracy of a detection result is improved.
It should be noted that the stress magnitude of the bare cell and the expansion risk magnitude of electric abuse and thermal abuse are generally in positive correlation, that is, the larger the stress, the larger the expansion risk. In some embodiments, a quantitative data relationship may be established between the force (represented by the detection value) and the expansion risk (represented by the preset value in the present invention), or a hierarchical correspondence may be established between the force and the expansion risk in a table, a curve, or the like (may be achieved by connecting the pressure sensor 11 to a signal converter, a client, an upper computer, or the like). Of course, in some embodiments, the risk of expansion may also be represented by parameters after further processing, such as the speed of change of the detected value, which is not particularly limited in the present invention.
It should be noted that, in some embodiments, the above-mentioned risk of expansion may be reflected by deriving the mechanical properties of the internal structure of the cell 2 and obtaining a preset value in a computational manner. Of course, the above-mentioned preset values may also be verified or obtained by experimental means. The simulated cell detection assembly 1 and a batch of cells 2 of the same type are placed in the same environment, and the extrusion force is applied in the same way, and the detection value can reflect the stress condition of the bare cell. The extrusion force is gradually increased from small to large, and after a certain proportion or quantity of the cells 2 have expansion risks, the detection value obtained at the moment can be used as a preset value of the type of the cells 2 so as to reflect the relation between the stress and the expansion risk of the bare cells of the type of the cells 2. Of course, since the different types of battery cells 2 have different mechanical properties of the internal structure, the invention does not limit specific proportion or number, as long as the magnitude of the expansion risk of the battery module can be reflected by comparing the detection value with a preset value.
Preferably, in this embodiment, as shown in fig. 2, the battery cell simulating detection assembly 1 further has a positive electrode simulating tab and a negative electrode simulating tab, and an electrical connection is formed between the positive electrode simulating tab and the negative electrode simulating tab, and the battery cell simulating tab and the negative electrode simulating tab can be used for being electrically connected with the battery cell 2, so that the battery cell simulating detection assembly 1 can be conveniently installed in a battery module without changing an electrical connection structure in an existing battery module, and the battery module can be installed in a specific scene such as a vehicle for detection. By placing the battery module in a specific scene such as a vehicle for detection, particularly in the case of running of the vehicle, the correlation and accuracy between the detection value of the pressure sensor 11 and the specific risk of expansion can be greatly enhanced.
Specifically, as shown in fig. 3, a metal strip 12 is disposed in the case structure 10, and both ends of the metal strip 12 penetrate out of the case structure 10 to form the above-described pseudo-positive electrode tab and pseudo-negative electrode tab. When the simulated positive electrode lug and the simulated negative electrode lug are connected into the circuit in the battery module, the battery cells 2 can be connected in series and parallel through the metal belt 12, and the connection mode is the same as that of the actual battery cells 2. Preferably, the metal strip 12 is a copper strip, which has similar performance to the tab of the real cell 2, and is convenient for welding connection.
Further, in the present embodiment, the pressure sensor 11 is an expansion force displacement test pressure sensor, which mainly comprises a resistance strain gauge, an elastic element, and a detection circuit, and mainly measures strain through the resistance strain gauge. The resistive strain gauge is capable of converting a change in strain on the mechanical member into a change in resistance. The elastic element is used for bearing and transmitting vertical load, and relieving and inhibiting impact caused by uneven pavement, so that the strain of the resistance strain gauge is more accurate. The resistance strain gauge is connected to the detection circuit, and when the resistance of the resistance strain gauge changes, the detection circuit can further change into an electric signal which can be directly used according to the changes of voltage, current and the like caused by the resistance change. The expansion force displacement test pressure sensor can be made of different elastomer materials, such as an elastomer made of aluminum, alloy, stainless steel and other different materials, and can achieve longer service life and detection life; the signals can also be output according to different properties, such as digital, analog, built-in amplifier, etc., so as to achieve various precision levels, such as 0.05/0.1/0.2/0.3/0.5, etc. Compared with a film sensor, the pressure sensor 11 has more accurate detection results, and can maintain better accuracy in the long-time detection process, thereby improving the accuracy of the detection results.
It should be noted that the housing structure 10 may have different dimensions for different cells 2. Taking the width direction as an example, when the housing structure 10 is wider, the pressure sensor 11 cannot abut against the inner walls of both sides of the housing structure 10, so that the above-mentioned pressing force cannot be detected normally. At this time, as shown in fig. 3, the pole piece 13 may be filled between the inner wall of the housing structure 10 and the pressure sensor 11, and the pole piece 13 can abut between the pressure sensor 11 and the housing structure 10, so that the pressure sensor 11 can normally detect the pressing force between the inner walls of the housing structure 10. The positive electrode plate or the negative electrode plate is adopted for the electrode plate 13, and the relationship and accuracy between the extrusion force and the expansion risk can be further improved as the same as the electrode plate 13 in the actual battery cell 2.
The invention also provides a module expansion risk detection method, which uses the imitated battery cell detection assembly 1 to detect the expansion risk. Specifically, as shown in fig. 1, the module expansion risk detection method includes:
s1, replacing at least one battery cell 2 in the battery module with an imitation battery cell detection assembly 1, wherein a pressure sensor 11 is arranged in the imitation battery cell detection assembly 1, and the pressure sensor 11 is used for indirectly detecting the stress of a bare battery cell in the battery cell 2.
In this step, the battery module may be assembled by replacing at least one of the battery cells 2 with the battery cell-like detection assembly 1 and installing the battery cell-like detection assembly in the battery module, or by removing one of the battery cells 2 and replacing the battery cell-like detection assembly 1 after the battery module is assembled. The simulated battery cell detection assembly 1 and the actual battery cell 2 are welded on a copper bar in series-parallel connection, and then the shell, the cover plate and the end plate of the battery module are assembled, and the installation process adopts an installation flow consistent with that of a normal battery module.
And S2, charging and/or discharging the battery module, and evaluating the expansion risk of the battery module according to the detection value of the pressure sensor 11.
In this step, by charging and discharging the battery module, the internal battery cell 2 expands in the working state, so that the extrusion force suffered by the bare cell in the real battery cell 2 can be indirectly detected by the pressure sensor 11 built in the imitated battery cell detection assembly 1, and the counteracting effect of the shell structure 10 of the battery cell 2 on the expansion force is eliminated. Since the pressing force is the main cause of the occurrence of the above-mentioned electric abuse and thermal abuse, a qualitative or quantitative association is established between the pressing force (represented by the detection value) and the risk of expansion (for example, the above-mentioned preset value), and the magnitude of the risk of expansion can be reflected more accurately by comparing the detection value with the preset value.
The extrusion force between the inner walls of the shell structure 10 is directly detected through the pressure sensor 11, the existing battery module structure and the shell structure 10 of the battery core 2 are maintained, the stress of bare cells in other battery cores 2 can be indirectly measured more accurately, the interference of the shell structure 10 of the battery core 2 on the expansion force is eliminated, the expansion risk of electric abuse and thermal abuse is more accurately reflected, the required detection structure is simple and easy to obtain, and the detection with higher accuracy can be carried out in a specific use scene. Meanwhile, the pressure sensor 11 is arranged in the shell structure 10, so that the shell structure has enough installation space, and the pressure sensor 11 of a non-film type can be selected, so that the problems of large error, short service life, data drift and the like of the film pressure sensor 11 can be avoided, and the accuracy of a detection result is improved.
In step S1, the number of the battery cell detection modules 1 installed therein is not limited, and only one battery cell 2 may be replaced, or a plurality of battery cells 2 may be replaced, respectively. For example, two battery cells 2 are replaced in the battery module by two battery cell simulating detection assemblies 1 respectively, and at least one real battery cell 2 is clamped between the two battery cell simulating detection assemblies 1, so that different positions in the battery module are detected.
Preferably, in the step S2, the method further includes:
and S21, mounting the battery module on a vehicle, and obtaining the detection value.
In step S21, the battery module is mounted on the vehicle, so that the risk of expansion can be detected in a specific scene, detection interference caused by environmental distinction in a laboratory and the specific scene is avoided, and the accuracy of the detection value can be improved.
Further, after step S21, the method further includes:
and step S22, obtaining the detection value when the vehicle is in a running state.
By placing the battery module in a specific scene such as a vehicle for detection, particularly in the case of running of the vehicle, the correlation and accuracy between the detection value of the pressure sensor 11 and the specific risk of expansion can be greatly enhanced.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The module expansion risk detection method is characterized by comprising the following steps:
replacing at least one battery cell (2) in a battery module with an imitation battery cell detection assembly (1), wherein a pressure sensor (11) is arranged in the imitation battery cell detection assembly (1), and the pressure sensor (11) is used for indirectly detecting the stress of a bare battery cell in the battery cell (2);
and charging and/or discharging the battery module, and evaluating the expansion risk of the battery module according to the detection value of the pressure sensor (11).
2. The method for detecting risk of inflation of a mold according to claim 1, wherein,
the battery cell simulating detection assemblies (1) are provided with shell structures (10) which are the same as the battery cells (2), and each battery cell simulating detection assembly (1) is used for replacing one battery cell (2).
3. The method for detecting risk of inflation of a mold according to claim 2, wherein,
replacing one of the battery cells (2) with the simulated battery cell detection assembly (1); or,
and replacing at least two of the battery cells (2) with the simulated battery cell detection assembly (1).
4. The method for detecting risk of inflation of a mold according to claim 3, wherein,
the battery cells (2) are clamped between two adjacent battery cell simulating detection assemblies (1).
5. The method for detecting risk of die swell according to any one of claims 1 to 4, wherein,
and installing the battery module on a vehicle, and obtaining the detection value.
6. The method for detecting risk of die swell according to claim 5, wherein,
and obtaining the detection value when the vehicle is in a running state.
7. Detection device for implementing the method for detecting the risk of swelling of a module according to any one of claims 1 to 6, characterized in that it comprises at least one imitation cell detection assembly (1), each of said imitation cell detection assemblies (1) being able to be mounted on a battery module instead of one cell (2); the battery cell simulating detection assembly (1) is provided with a shell structure (10) which is the same as the battery cell (2), a pressure sensor (11) is arranged in the shell structure (10), and the pressure sensor (11) can indirectly detect the stress of a bare battery cell in the battery cell (2).
8. The detecting device according to claim 7, wherein,
the battery cell simulating detection assembly (1) is provided with a simulated positive lug and a simulated negative lug which are electrically connected, and the simulated positive lug and the simulated negative lug are electrically connected with the battery cell (2).
9. The detecting device according to claim 8, wherein,
the pressure sensor is characterized in that a pole piece (13) is arranged in the shell structure (10), the pole piece (13) comprises a positive pole piece or a negative pole piece, and the pole piece (13) is abutted between the pressure sensor (11) and the inner wall of the shell structure (10).
10. The detecting device according to claim 8, wherein,
a metal belt (12) is arranged in the shell structure (10), and two ends of the metal belt (12) penetrate out of the shell structure (10) to form the imitated positive electrode lug and the imitated negative electrode lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389619.1A CN117438684A (en) | 2023-10-25 | 2023-10-25 | Module expansion risk detection method and detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311389619.1A CN117438684A (en) | 2023-10-25 | 2023-10-25 | Module expansion risk detection method and detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117438684A true CN117438684A (en) | 2024-01-23 |
Family
ID=89549267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311389619.1A Pending CN117438684A (en) | 2023-10-25 | 2023-10-25 | Module expansion risk detection method and detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117438684A (en) |
-
2023
- 2023-10-25 CN CN202311389619.1A patent/CN117438684A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110828919B (en) | Battery thermal runaway early warning system and method | |
| CN110959122B (en) | Method and apparatus for evaluating safety of secondary battery | |
| CN110429298B (en) | Detection device and method for proton exchange membrane fuel cell | |
| CN111446510B (en) | Battery expansion force measuring device and measuring method | |
| CN106595914B (en) | Method and device for determining expansion degree of battery cell by using strain gauge | |
| CN112350003A (en) | Single battery and expansion testing method thereof | |
| CN116565361A (en) | Pressure sensing assembly of battery module, life evaluation system and method | |
| CN114787604B (en) | Device for measuring cell pressure | |
| CN117438684A (en) | Module expansion risk detection method and detection device | |
| JP7332099B2 (en) | Battery cell swelling inspection device | |
| CN210741711U (en) | Electricity core bulging force testing arrangement | |
| CN219161479U (en) | Terminal temperature measurement structure and connector | |
| CN218004994U (en) | Battery package and vehicle | |
| CN111580001A (en) | Battery volume change in-situ testing device | |
| CN116087778A (en) | Self-adaptive battery expansion detection method | |
| CN110261787B (en) | Optimal heating power method selected during thermal runaway test of cylindrical ternary lithium ion battery | |
| CN114946067A (en) | Battery cell holder comprising a membrane pressure sensor and method for measuring the swelling of a battery cell | |
| CN116294959B (en) | Battery bulge on-line monitoring system and method | |
| CN116802885A (en) | Battery self-discharge detection method, circuit and equipment | |
| JP7133964B2 (en) | BATTERY MODULE MANUFACTURING METHOD AND MECHANICAL PROPERTIES MEASURING DEVICE | |
| CN217158300U (en) | Power battery cell bulging measurement device | |
| CN220019699U (en) | Test fixture and electric core extrusion testing arrangement | |
| US20230087294A1 (en) | Assembled battery testing method | |
| CN210376635U (en) | Battery module expansion force detection device | |
| CN215004841U (en) | Measure device of diaphragm infiltration nature |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |